Winter came early for Beijing Sunday, as snow descended on the Chinese city and temperatures dropped to 29 degrees Fahrenheit. The government was behind the unexpected weather. The meteorological department, which routinely injects silver iodide into the clouds to release precipitation, was trying to counter the country’s widespread drought in its northern region. The rainmakers succeeded in producing 17 million tons of snow for the city. It was the earliest snowfall for Beijing in the past 10 years.